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本文通过测定样品在三氯化铝-盐酸溶液中的溶解-混合焓,引用了文献上有关的焓值,得到了无水四氟化铀(晶)标准生成焓.结果是:△H_1~0(298.15K)=-1894.5±7.5千焦耳·克分子~(-1).文中对Мальцев等的反应方案作了修改、实测和讨论,结果与本文一致.
In this paper, the standard enthalpies of formation of anhydrous uranium tetrafluoride (crystal) were obtained by measuring the enthalpy of the sample in solution of aluminum trichloride-hydrochloric acid and the enthalpy of the sample. The results are as follows: △ H_1 ~ 0 (298.15K) = - 1894.5 ± 7.5kJ · mol -1 .The reaction scheme of Мальцев et al was modified, measured and discussed in the paper, and the result was consistent with this paper.